chore: Update discovery artifacts (#1462)

## Deleted keys were detected in the following stable discovery artifacts:
sqladmin v1 https://github.com/googleapis/google-api-python-client/commit/cef24d829ab5be71563a2b668b8f6cf5dda2c8e4

## Deleted keys were detected in the following pre-stable discovery artifacts:
alertcenter v1beta1 https://github.com/googleapis/google-api-python-client/commit/70810a52c85c6d0d6f00d7afb41c8608261eaebc

## Discovery Artifact Change Summary:
feat(alertcenter): update the api https://github.com/googleapis/google-api-python-client/commit/70810a52c85c6d0d6f00d7afb41c8608261eaebc
feat(chat): update the api https://github.com/googleapis/google-api-python-client/commit/a577cd0b71951176bbf849c1f7f139127205da54
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/9066056a8b106d441fb7686fe84359484d0d58bc
feat(content): update the api https://github.com/googleapis/google-api-python-client/commit/b123349da33c11c0172a8efb3fadef685a30e6e1
feat(displayvideo): update the api https://github.com/googleapis/google-api-python-client/commit/c525d726ee6cffdd4bc7afd69080d5e52bae83a0
feat(dns): update the api https://github.com/googleapis/google-api-python-client/commit/13436ccd2b835fda5cb86952ac4ea991ee8651d8
feat(eventarc): update the api https://github.com/googleapis/google-api-python-client/commit/6be3394a64a5eb509f68ef779680fd36837708ee
feat(file): update the api https://github.com/googleapis/google-api-python-client/commit/817a0e636771445a988ef479bd52740f754b901a
feat(monitoring): update the api https://github.com/googleapis/google-api-python-client/commit/bd32149f308467f0f659119587afc77dcec65b14
feat(people): update the api https://github.com/googleapis/google-api-python-client/commit/aa6b47df40c5289f33aef6fb6aa007df2d038e20
feat(retail): update the api https://github.com/googleapis/google-api-python-client/commit/d39f06e2d77034bc837604a41dd52c577f158bf2
feat(securitycenter): update the api https://github.com/googleapis/google-api-python-client/commit/999fab5178208639c9eef289f9f441052ed832fc
feat(speech): update the api https://github.com/googleapis/google-api-python-client/commit/3b2c0fa62b2a0c86bba1e97f1b18f93250dbd551
feat(sqladmin): update the api https://github.com/googleapis/google-api-python-client/commit/cef24d829ab5be71563a2b668b8f6cf5dda2c8e4
diff --git a/docs/dyn/speech_v1p1beta1.projects.locations.customClasses.html b/docs/dyn/speech_v1p1beta1.projects.locations.customClasses.html
index 558cd75..3c2acb5 100644
--- a/docs/dyn/speech_v1p1beta1.projects.locations.customClasses.html
+++ b/docs/dyn/speech_v1p1beta1.projects.locations.customClasses.html
@@ -120,7 +120,7 @@
     ],
     "name": "A String", # The resource name of the custom class.
   },
-  "customClassId": "A String", # The ID to use for the custom class, which will become the final component of the custom class' resource name. This value should be 4-63 characters, and valid characters are /a-z-/.
+  "customClassId": "A String", # Required. The ID to use for the custom class, which will become the final component of the custom class' resource name. This value should be 4-63 characters, and valid characters are /a-z-/.
 }
 
   x__xgafv: string, V1 error format.